I was just curious how other people approach the situation.
My most direct and safiest route on the commute home is down a state highway, during a snowstorm the side roads are far more dangerous. On the few occasions that I've biked home during a heavy snow storm, I've had a problem with encountering snow plows. Not just some townie in a pickup truck either, because it is a state route I usually encounter the big industrial snow plows. Sometimes there are two working in tandem.
What can make the situation really hair raising is that with heavy snow comes heavy cloud cover, so even in the middle of the day there is a really grayish, flat light. And, the visibility may be further obscured by falling snow. Any blinkie that would normally be visible 600 feet away is only visible from about 60 feet in those conditions.
I usually just switch sides and ride on the wrong side until the plow(s) pass(es). There usually isn't many cars on the road, so crisscrossing isn't the hazard it normally would be.
I only did that for one season though, I don't think my heart could take the hair raising excitement of ducking snow plows for longer than that. Now if it's snowing too heavily, I just stay at the hotel next to where I work. My employer pays for the room if I choose to stay over, which is a nice perk.